Two lower courts have rejected the Indiana Democratic party's claim that requiring a photo ID at the polls could deny people the right to vote. U.S. District Judge Sarah Evans Barker noted the party has yet to produce a single voter that's happened to.

A dissenting opinion in the appeals court ruling upholding Barker charged the law is likely to discourage voting by groups which tend to vote Democratic.

Another federal court threw out Missouri's voter ID law. Indiana Secretary of State Todd Rokita says Indiana's law is more carefully crafted.

The law includes provisions requiring license branches to provide free ID's to voters without driver's licenses, and granting exceptions to senior citizens.

Rokita is the defendant in the lawsuit, and will be in court for the hearing. He says he expects tough questioning from the justices for both sides, but predicts the law will be upheld.